7-3
Clean up Spills
Spills should be cleaned up promptly to prevent biohazard build-up and corrosion. Clean any
spills of biological material from the sample area.
If there is any evidence of salt build-up around the base of the sample chamber, follow the
procedure in Section 7.3 to disassemble the chamber and clean the base. Check that the drain
tube fits tightly over the stainless steel fitting at the bottom of the chamber. If loose, replace the
tubing. See Appendix B for the part number of the 2700 SELECT preventive maintenance kit.
Daily Operational Checks
To verify proper instrument performance, perform the daily operational checks described in
Section 3.3.
Perform this procedure at least once a month to minimize the possibility of contamination. The
most convenient time to perform this maintenance is before installation of a new bottle of
calibration standard at Station #1.
Exit Run or Standby Mode to prevent autoflushing and autocalibrations. This also allows you to
access Service Menu from the keypad.
Press [MENU], then [1], for Service.
Prepare about 100 mL of a nominal 1% solution of hypochlorite (1 part commercial bleach with
3 parts deionized or distilled water) and place this solution in a clean 250 mL bottle that has
threads compatible with the Cal Cap Assembly at Station #1.
Attach the Cal Cap Assembly, tighten, and shake gently to insure thorough washing of the
inside of the cap assembly.
From the Service Menu, initiate cal priming to flush hypochlorite solution through the pump
tubing and steel tubes to the Sample Chamber Waste Bottle. Repeat this flush cycle 3 times,
wait 10 minutes, then flush one more time.
Remove and discard the hypochlorite solution, then rinse the bottle thoroughly with water.
Next, add deionized or distilled water to the bottle, reattach the Cal Cap Assembly at Station #1,
and shake gently to thoroughly rinse the inside of the cal cap.
From the Service Menu, initiate 3 flushes to rinse the tubing and steel tubes with water.
Remove the Cal Cap Assembly, flush one time with air, and wipe the cal cap and steel tubes
with a clean laboratory tissue.
Install a new bottle of calibration standard and mark the installation date on the bottle as
described in section 2.3 Reagent Preparation.
From the Service Menu, initiate 3 Cal flushes to prime the Calibration Pumping System. You
are now ready to re-enter Run Mode.
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